D12121212121313233313123231323223313132322331323132233132333132313331323332121   >>    D1212121212131323331312323132322331313232233132313223313233313231333132333212   <<    D12121212121313233313123231323223313132322331323132233132333132313331323332123   >>      D12121212121313233313123231323223313132322331323132233132333132313331323332122   >>